We migrated our production site collections to our test server like this:
prdserver/dev ---> testserver/dev (will be the new dev, the prd/dev will be deleted)
prdserver/prd ---> testserver/prd (will be used as uat)
This was done with a
Restore-SPSite methods, with powershell.
I don't really know why, but the user names on the testserver/prd site collection look like
The other 3 sites have no issues. After some research, I found that this is due to different authentication settings, but as far as I understood, this can only be done on application, and not on site collection level. Can someone help me what did here go wrong and how to repair it? I wanted to move my scripts from dev to uat, but all my access mgmt scripts are failing, because the domain\userid text is not recognized as valid userid. I do not want to build an extra hook in all the scripts, if it can be resolved otherwise.
Looks like that my initial finding was not correct. Both migrated sites have claims authentication, but the difference in the user names only comes visible, when a new user is added to the site. Existing users still show up in domain/username format.